如题:译码部分出问题了,译码为红色部分,大家帮我看看,THX #include<stdio.h> #define MAXVALUE 10000 #define MAXLEAF 30 #define MAXNODE MAXLEAF*2-1 #define MAXBIT 10
typedef struct node {char letter; int weight; int parent; int lchild; int rchild; }HNodeType;
typedef struct {char letter; int bit[MAXBIT]; int start; }HCodeType;
typedef struct {char s; int num; }Bowen;
void HuffmanTree(HNodeType HuffNode[],int n,Bowen a[]) {int i,j,m1,m2,x1,x2;
for(i=0;i<2*n-1;i++) {HuffNode[i].letter=NULL; HuffNode[i].weight=0; HuffNode[i].parent=-1; HuffNode[i].lchild=-1; HuffNode[i].rchild=-1;} for(i=0;i<n;i++){HuffNode[i].weight=a[i].num;HuffNode[i].letter=a[i].s;} for(i=0;i<n-1;i++) {m1=m2=MAXVALUE; x1=x2=0; for(j=0;j<n+i;j++) { if(HuffNode[j].parent==-1&&HuffNode[j].weight<m1) {m2=m1;x2=x1; m1=HuffNode[j].weight; x1=j;} else if(HuffNode[j].parent==-1&&HuffNode[j].weight<m2) {m2=HuffNode[j].weight; x2=j;} } HuffNode[x1].parent=n+i;HuffNode[x2].parent=n+i; HuffNode[n+i].weight=HuffNode[x1].weight+HuffNode[x2].weight; HuffNode[n+i].lchild=x1; HuffNode[n+i].rchild=x2;}}
void HuffmanCode(int n,Bowen a[]) {HNodeType HuffNode[MAXNODE]; HCodeType HuffCode[MAXLEAF],cd; int i,j,c,p,*q;char code[30],*m; tree=(HNodeType *)malloc(sizeof(HNodeType)); HuffmanTree(HuffNode,n,a); for(i=0;i<n;i++) {cd.start=n-1; c=i; p=HuffNode[c].parent; while(p!=-1) {if(HuffNode[p].lchild==c) cd.bit[cd.start]=0; else cd.bit[cd.start]=1; cd.start--; c=p; p=HuffNode[c].parent;} for(j=cd.start+1;j<n;j++) HuffCode[i].bit[j]=cd.bit[j]; HuffCode[i].start=cd.start;} for(i=0;i<n;i++) {HuffCode[i].letter=HuffNode[i].letter; printf("%c ",HuffCode[i].letter); for(j=HuffCode[i].start+1;j<n;j++) printf("%d",HuffCode[i].bit[j]); printf("\n");} printf("Now,input the code:\n"); for(i=0;i<30;i++) code[i]=NULL; scanf("%s",&code); m=code; j=2*n-2; while(*m!=NULL) {if(*m=='0') {c=i=HuffNode[c].lchild; c=HuffNode[c].lchild; if(c==-1) {printf("%c",HuffNode[i].letter);c=2*n-2;}} if(*m=='1') {c=i=HuffNode[c].rchild; c=HuffNode[c].rchild; if(c==-1) {printf("%c",HuffNode[i].letter);c=2*n-2;}} m++; } }
main() {Bowen data[30]; char s[100],*p; int i,count=0;clrscr(); printf("Input some letters:"); scanf("%s",&s);
for(i=0;i<30;i++) {data[i].s=NULL; data[i].num=0;} p=s; while(*p) {for(i=0;i<=count+1;i++) {if(data[i].s==NULL) {data[i].s=*p;data[i].num++;count++;break;} else if(data[i].s==*p) {data[i].num++;break;}} p++;} printf("\n"); printf("different letters:%d\n",count); for(i=0;i<count;i++) {printf("%c ",data[i].s); printf("weight:%d",data[i].num); printf("\n\n");} HuffmanCode(count,data); getch();}
[此贴子已经被作者于2005-4-24 12:17:12编辑过]
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